To curl the top, unclip small sections at a a time and spray with hair spray. Using a half inch curling iron, take a small, finger-width section of hair, and, with the iron close to the scalp, wind the hair around the barrell with the clamp closed. Keep the hair flat without letting it twist. Make sure the curls go in the same direction all the way around your head. This is important because the 'one way' direction of the curl is what makes the wave.